RAFT光引发分散聚合制备单分散PMMA微球  

Synthesis of Monodisperse PMMA Microspheres by Photoinitiated RAFT Dispersion Polymerization

作　　者：付黎黎[1] 柏宇豪 张雪超[1] 谭剑波[1] 张力[1] Fu Li-li;Bai Yu-hao;Zhang Xue-chao;Tan Jian-bo;Zhang Li(School of Materials and Energy, Guangdong University of Technology, Guangzhou 510006, China)

机构地区：[1]广东工业大学材料与能源学院,广东广州510006

出　　处：《广东工业大学学报》2017年第2期34-39,47,共7页Journal of Guangdong University of Technology

基　　金：国家自然科学基金资助项目(21504017)

摘　　要：在乙醇/水的反应介质中,通过RAFT光分散聚合制备了聚甲基丙烯酸甲酯(PMMA)微球.探究了RAFT光分散聚合机理,研究了反应条件对微球粒径及粒径分布的影响.结果表明:RAFT光分散聚合的成核期为60 min左右.光引发剂浓度和稳定剂浓度对微球均匀性影响不大;RAFT试剂质量浓度为0.25%~0.75%,能够获得单分散微球;微球粒径随单体浓度增加或者反应介质中乙醇含量的增加而增大.In this study, poly (methyl methacrylate) (PMMA) microspheres were synthesized by photoinitiated RAFT dispersion polymerization in an ethanol/water mixture. The mechanism of photoinitiated RAFT dispersion polymerization was investigated, and the effects of reaction conditions on microspheres size and size distribution studied. The results showed that the nucleation of photoinitiated RAFT dispersion polymerization was at around 60 min. The concentrations of photoinitiator and stabilizer had a little influence on the particle uniformity.Monodisperse microspheres were obtained at RAFT agent concentrations ranging from 0.25% to 0.75%. It was found that the diameter of microspheres became larger as the monomer concentration or the content of ethanol in the medium increased.

关 键 词：光引发 RAFT聚合 分散聚合 单分散微球 

分 类 号：TQ323.8[化学工程—合成树脂塑料工业]